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Commit 91f91d7a authored by Darrell Shi's avatar Darrell Shi
Browse files

(Resubmit) Move dream metadata parsing to framework. 

Bug: 214117287
Test: atest com.android.server.dreams.DreamServiceTest
Test: manually on device by opening Screensaver settings because it
calls into the metadata parsing from DreamBackend

Change-Id: I252f634dd10297ba7dcd91fae6289a85a2904e3d
parent b45c44cb

core/java/android/service/dreams/DreamService.java

+115 −2
Original line number Diff line number Diff line
@@ -31,6 +31,11 @@ import android.content.ComponentName; 
import android.content.Context;

import android.content.Intent;

import android.content.ServiceConnection;

import android.content.pm.PackageManager;

import android.content.pm.ServiceInfo;

import android.content.res.TypedArray;

import android.content.res.XmlResourceParser;

import android.graphics.drawable.Drawable;

import android.os.Build;

import android.os.Handler;

import android.os.IBinder;
@@ -39,9 +44,11 @@ import android.os.Looper; 
import android.os.PowerManager;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.util.AttributeSet;

import android.util.Log;

import android.util.MathUtils;

import android.util.Slog;

import android.util.Xml;

import android.view.ActionMode;

import android.view.Display;

import android.view.KeyEvent;
@@ -59,7 +66,11 @@ import android.view.accessibility.AccessibilityEvent; 


import com.android.internal.util.DumpUtils;



import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;



import java.io.FileDescriptor;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayDeque;

import java.util.function.Consumer;
@@ -159,8 +170,9 @@ import java.util.function.Consumer; 
 * </pre>

 */

public class DreamService extends Service implements Window.Callback {

    private final String mTag =

            DreamService.class.getSimpleName() + "[" + getClass().getSimpleName() + "]";

    private static final String TAG = DreamService.class.getSimpleName();

    private final String mTag = TAG + "[" + getClass().getSimpleName() + "]";

    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);



    /**

     * The name of the dream manager service.
@@ -190,6 +202,11 @@ public class DreamService extends Service implements Window.Callback { 
     */

    public static final String DREAM_META_DATA = "android.service.dream";



    /**

     * Name of the root tag under which a Dream defines its metadata in an XML file.

     */

    private static final String DREAM_META_DATA_ROOT_TAG = "dream";



    /**

     * Extra containing a boolean for whether to show complications on the overlay.

     * @hide
@@ -1080,6 +1097,84 @@ public class DreamService extends Service implements Window.Callback { 


    // end public api



    /**

     * Parses and returns metadata of the dream service indicated by the service info. Returns null

     * if metadata cannot be found.

     *

     * Note that {@link ServiceInfo} must be fetched with {@link PackageManager#GET_META_DATA} flag.

     *

     * @hide

     */

    @Nullable

    public static DreamMetadata getDreamMetadata(Context context, ServiceInfo serviceInfo) {

        final PackageManager pm = context.getPackageManager();



        final TypedArray rawMetadata = readMetadata(pm, serviceInfo);

        if (rawMetadata == null) return null;



        final DreamMetadata metadata = new DreamMetadata(

                convertToComponentName(rawMetadata.getString(

                        com.android.internal.R.styleable.Dream_settingsActivity), serviceInfo),

                rawMetadata.getDrawable(

                        com.android.internal.R.styleable.Dream_previewImage));

        rawMetadata.recycle();

        return metadata;

    }



    /**

     * Returns the raw XML metadata fetched from the {@link ServiceInfo}.

     *

     * Returns <code>null</code> if the {@link ServiceInfo} doesn't contain valid dream metadata.

     */

    @Nullable

    private static TypedArray readMetadata(PackageManager pm, ServiceInfo serviceInfo) {

        if (serviceInfo == null || serviceInfo.metaData == null) {

            return null;

        }



        try (XmlResourceParser parser =

                     serviceInfo.loadXmlMetaData(pm, DreamService.DREAM_META_DATA)) {

            if (parser == null) {

                if (DEBUG) Log.w(TAG, "No " + DreamService.DREAM_META_DATA + " metadata");

                return null;

            }



            final AttributeSet attrs = Xml.asAttributeSet(parser);

            while (true) {

                final int type = parser.next();

                if (type == XmlPullParser.END_DOCUMENT || type == XmlPullParser.START_TAG) {

                    break;

                }

            }



            if (!parser.getName().equals(DREAM_META_DATA_ROOT_TAG)) {

                if (DEBUG) {

                    Log.w(TAG, "Metadata does not start with " + DREAM_META_DATA_ROOT_TAG + " tag");

                }

                return null;

            }



            return pm.getResourcesForApplication(serviceInfo.applicationInfo).obtainAttributes(

                    attrs, com.android.internal.R.styleable.Dream);

        } catch (PackageManager.NameNotFoundException | IOException | XmlPullParserException e) {

            if (DEBUG) Log.e(TAG, "Error parsing: " + serviceInfo.packageName, e);

            return null;

        }

    }



    private static ComponentName convertToComponentName(String flattenedString,

            ServiceInfo serviceInfo) {

        if (flattenedString == null) {

            return null;

        }



        if (!flattenedString.contains("/")) {

            return new ComponentName(serviceInfo.packageName, flattenedString);

        }



        return ComponentName.unflattenFromString(flattenedString);

    }



    /**

     * Called by DreamController.stopDream() when the Dream is about to be unbound and destroyed.

     *
@@ -1302,4 +1397,22 @@ public class DreamService extends Service implements Window.Callback { 
            onWindowCreated(a.getWindow());

        }

    }



    /**

     * Represents metadata defined in {@link android.R.styleable#Dream &lt;dream&gt;}.

     *

     * @hide

     */

    public static final class DreamMetadata {

        @Nullable

        public final ComponentName settingsActivity;



        @Nullable

        public final Drawable previewImage;



        DreamMetadata(ComponentName settingsActivity, Drawable previewImage) {

            this.settingsActivity = settingsActivity;

            this.previewImage = previewImage;

        }

    }

}

packages/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java

+7 −85
Original line number Diff line number Diff line
@@ -26,8 +26,6 @@ import android.content.pm.PackageManager; 
import android.content.pm.ResolveInfo;

import android.content.pm.ServiceInfo;

import android.content.res.Resources;

import android.content.res.TypedArray;

import android.content.res.XmlResourceParser;

import android.graphics.drawable.Drawable;

import android.os.RemoteException;

import android.os.ServiceManager;
@@ -35,21 +33,14 @@ import android.provider.Settings; 
import android.service.dreams.DreamService;

import android.service.dreams.IDreamManager;

import android.text.TextUtils;

import android.util.AttributeSet;

import android.util.Log;

import android.util.Xml;



import com.android.settingslib.R;



import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;



import java.io.IOException;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashSet;

import java.util.List;
@@ -185,15 +176,18 @@ public class DreamBackend { 
            dreamInfo.componentName = componentName;

            dreamInfo.isActive = dreamInfo.componentName.equals(activeDream);



            final DreamMetadata dreamMetadata = getDreamMetadata(pm, resolveInfo);

            dreamInfo.settingsComponentName = dreamMetadata.mSettingsActivity;

            dreamInfo.previewImage = dreamMetadata.mPreviewImage;

            final DreamService.DreamMetadata dreamMetadata = DreamService.getDreamMetadata(mContext,

                    resolveInfo.serviceInfo);

            if (dreamMetadata != null) {

                dreamInfo.settingsComponentName = dreamMetadata.settingsActivity;

                dreamInfo.previewImage = dreamMetadata.previewImage;

            }

            if (dreamInfo.previewImage == null) {

                dreamInfo.previewImage = mDreamPreviewDefault;

            }

            dreamInfos.add(dreamInfo);

        }

        Collections.sort(dreamInfos, mComparator);

        dreamInfos.sort(mComparator);

        return dreamInfos;

    }
@@ -483,78 +477,6 @@ public class DreamBackend { 
        return new ComponentName(resolveInfo.serviceInfo.packageName, resolveInfo.serviceInfo.name);

    }



    private static final class DreamMetadata {

        @Nullable

        Drawable mPreviewImage;

        @Nullable

        ComponentName mSettingsActivity;

    }



    @Nullable

    private static TypedArray readMetadata(PackageManager pm, ServiceInfo serviceInfo) {

        if (serviceInfo == null || serviceInfo.metaData == null) {

            return null;

        }

        try (XmlResourceParser parser =

                     serviceInfo.loadXmlMetaData(pm, DreamService.DREAM_META_DATA)) {

            if (parser == null) {

                Log.w(TAG, "No " + DreamService.DREAM_META_DATA + " meta-data");

                return null;

            }

            Resources res = pm.getResourcesForApplication(serviceInfo.applicationInfo);

            AttributeSet attrs = Xml.asAttributeSet(parser);

            while (true) {

                final int type = parser.next();

                if (type == XmlPullParser.END_DOCUMENT || type == XmlPullParser.START_TAG) {

                    break;

                }

            }

            String nodeName = parser.getName();

            if (!"dream".equals(nodeName)) {

                Log.w(TAG, "Meta-data does not start with dream tag");

                return null;

            }

            return res.obtainAttributes(attrs, com.android.internal.R.styleable.Dream);

        } catch (PackageManager.NameNotFoundException | IOException | XmlPullParserException e) {

            Log.w(TAG, "Error parsing : " + serviceInfo.packageName, e);

            return null;

        }

    }



    private static ComponentName convertToComponentName(String flattenedString,

            ServiceInfo serviceInfo) {

        if (flattenedString == null) return null;



        if (flattenedString.indexOf('/') < 0) {

            flattenedString = serviceInfo.packageName + "/" + flattenedString;

        }



        ComponentName cn = ComponentName.unflattenFromString(flattenedString);



        if (cn == null) return null;

        if (!cn.getPackageName().equals(serviceInfo.packageName)) {

            Log.w(TAG,

                    "Inconsistent package name in component: " + cn.getPackageName()

                            + ", should be: " + serviceInfo.packageName);

            return null;

        }



        return cn;

    }



    private static DreamMetadata getDreamMetadata(PackageManager pm, ResolveInfo resolveInfo) {

        DreamMetadata result = new DreamMetadata();

        if (resolveInfo == null) return result;

        TypedArray rawMetadata = readMetadata(pm, resolveInfo.serviceInfo);

        if (rawMetadata == null) return result;

        result.mSettingsActivity = convertToComponentName(rawMetadata.getString(

                com.android.internal.R.styleable.Dream_settingsActivity), resolveInfo.serviceInfo);

        result.mPreviewImage = rawMetadata.getDrawable(

                com.android.internal.R.styleable.Dream_previewImage);

        rawMetadata.recycle();

        return result;

    }



    private static void logd(String msg, Object... args) {

        if (DEBUG) {

            Log.d(TAG, args == null || args.length == 0 ? msg : String.format(msg, args));

services/tests/servicestests/AndroidManifest.xml

+13 −0
Original line number Diff line number Diff line
@@ -130,6 +130,19 @@ 
               android:resource="@xml/test_account_type2_authenticator"/>

        </service>



        <service

            android:name="com.android.server.dreams.TestDreamService"

            android:exported="false"

            android:label="Test Dream" >

            <intent-filter>

                <action android:name="android.service.dreams.DreamService" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

            <meta-data

                android:name="android.service.dream"

                android:resource="@xml/test_dream_metadata" />

        </service>



        <receiver android:name="com.android.server.devicepolicy.ApplicationRestrictionsTest$AdminReceiver"

             android:permission="android.permission.BIND_DEVICE_ADMIN"

             android:exported="true">

services/tests/servicestests/res/xml/test_dream_metadata.xml

0 → 100644
+18 −0
Original line number Diff line number Diff line 
<!--

  ~ Copyright (C) 2022 The Android Open Source Project

  ~

  ~ Licensed under the Apache License, Version 2.0 (the "License");

  ~ you may not use this file except in compliance with the License.

  ~ You may obtain a copy of the License at

  ~

  ~      http://www.apache.org/licenses/LICENSE-2.0

  ~

  ~ Unless required by applicable law or agreed to in writing, software

  ~ distributed under the License is distributed on an "AS IS" BASIS,

  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  ~ See the License for the specific language governing permissions and

  ~ limitations under the License.

  -->



<dream xmlns:android="http://schemas.android.com/apk/res/android"

       android:settingsActivity="com.android.server.dreams/.TestDreamSettingsActivity" />

services/tests/servicestests/src/com/android/server/dreams/DreamServiceTest.java

0 → 100644
+53 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package com.android.server.dreams;



import static org.junit.Assert.assertEquals;



import android.content.ComponentName;

import android.content.Context;

import android.content.pm.PackageManager;

import android.content.pm.ServiceInfo;

import android.service.dreams.DreamService;



import androidx.test.filters.SmallTest;

import androidx.test.platform.app.InstrumentationRegistry;

import androidx.test.runner.AndroidJUnit4;



import org.junit.Test;

import org.junit.runner.RunWith;



@SmallTest

@RunWith(AndroidJUnit4.class)

public class DreamServiceTest {

    @Test

    public void testMetadataParsing() throws PackageManager.NameNotFoundException {

        final String testPackageName = "com.android.frameworks.servicestests";

        final String testDreamClassName = "com.android.server.dreams.TestDreamService";

        final String testSettingsActivity = "com.android.server.dreams/.TestDreamSettingsActivity";



        final Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();



        final ServiceInfo si = context.getPackageManager().getServiceInfo(

                new ComponentName(testPackageName, testDreamClassName),

                PackageManager.ComponentInfoFlags.of(PackageManager.GET_META_DATA));

        final DreamService.DreamMetadata metadata = DreamService.getDreamMetadata(context, si);



        assertEquals(0, metadata.settingsActivity.compareTo(

                ComponentName.unflattenFromString(testSettingsActivity)));

    }

}